iptables script in only one file
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
IPFIRE Firewall for ARM architecture (OrangePi)
Powerfull Web Application Firewall for PHP
360-FAAR Analyze FW1 Cisco Netscreen Policy Offline Using Config/Logs
Webinterface to (un)ban IPs in Fail2Ban
Open source voucher management / hotspot system
download and convert ip block list
network control and reporting
ddos_deflate, el Guapo Edition is network trench defense!
Easy to use firewall for linux beginners.
IP block list - can manage many thousands of IP addresses